Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Study of Europium-activated Calcium Aluminium Silicate Phosphors

유로피움-활성화 칼슘 알루미늄 실리케이트 형광체 연구

  • 황정하 (한국에너지기술연구원 기능재료연구센터) ;
  • 박주석 (한국에너지기술연구원 기능재료연구센터) ;
  • 장보윤 (한국에너지기술연구원 기능재료연구센터) ;
  • 남산 (고려대학교 신소재공학과 전자재료연구실) ;
  • 김준수 (한국에너지기술연구원 기능재료연구센터) ;
  • 유순재 ((주)이츠웰(Itswell))
  • Published : 2006.11.01
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Abstract

Europium$(Eu^{2+}\;or\;Eu^{3+})$-activated calcium aluminium silicate phosphors were synthesized for the first time and the structures and luminescence characteristics of these phosphors were investigated. The phosphors in this study emitted blue, green, and even red light depending on the starting milterials and annealing conditions for synthesis. In addition, the structure was also changed when the different starting materials were used. When $CaCO_3$ was used as a starting material, tetragonal $Ca_2Al_2SiO_7$ was formed. However, pure green light was emitted when the annealing was conducted in reduced atmosphere and red one was emitted by annealing in air. In the case of $CaSiO_3$ as a starting material, triclinic $CaAl_2Si_2O_8$ was formed and only pure blue emission was observed. Moreover, this blue phosphor exhibited higher intensity than that of commercial YAG:Ce phosphor, which showed the possibility of application on the phosphor for new light source such as a UV-LED.

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References

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